Toro Reelmaster 3100-D - Fuel Stop Solenoid Testing

FuelStopSolenoid
g346550
Figure138
1.Fuelpump
3.Fuellter
2.Fuelhose(discharge)
4.Fuelstopsolenoid
ThefuelstopsolenoidusedontheReelmastermustbeenergizedforthediesel
enginetorun.Thesolenoidismountedtotheinjectionpumpontheengine
(Figure138).
Thefuelstopsolenoidincludestwocoilsforoperation:thepullcoilandthehold
coil.WhenthekeyswitchisturnedtoSTART,thefuelstopsolenoidisinitially
energizedandthepullcoilretractsthesolenoidplunger.Oncetheplunger
isretracted,theholdcoilwillkeepitretractedforcontinuedengineoperation.
Whenthesolenoidisde-energized,theplungerextendstoshutofffuelsupply
totheenginecausingtheenginetostoprunning.Thefuelstopsolenoidis
groundedthroughthesolenoidhousing.
TestingtheFuelStopSolenoid(InPlace)
Note:Beforetakingthesmallresistancereadingswithadigitalmultimeter,short
themultimetertestleadstogether.Themeterwilldisplayasmallresistancevalue
(usually0.5ohmsorless).Thisresistanceisbecauseoftheinternalresistance
ofthemultimeterandtestleads.Subtractthisvaluefromthemeasuredvalueof
thecomponentyouaretesting.
1.Parkthemachineonalevelsurface,lowerthecuttingdeck,settheparking
brake,shutofftheengine,andremovethekeyfromthekeyswitch.
2.Unlatchthehoodandraiseit.
3.Locatethefuelstopsolenoidontheengineanddisconnectthewireharness
connectorfromthesolenoid.
ElectricalSystem:ComponentTesting
Page6–38
Reelmaster
®
3100-D/3105-D
20252SLRevA